One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,15)(12,16)(13,14)(17,18,22,27,23,26,21,28)(19,29,32,24,33,41,31,40)(20,34,36,43,38,44,37,25)(30,42,46,48,35,39,47,45)(2,5)(6,8)(10,14)(11,12)(17,19,23,33)(18,24,26,40)(20,35,38,30)(21,32,22,31)(25,42,43,39)(27,29,28,41)(34,45,44,48)(36,46,37,47)(1,3,4,7)(2,6,5,8)(9,11,13,12)(10,15,14,16)(17,20)(18,25)(19,30)(21,36)(22,37)(23,38)(24,39)(26,43)(27,44)(28,34)(29,45)(31,46)(32,47)(33,35)(40,42)(41,48)(9,12,13,11)(10,16,14,15)(18,26)(24,40)(25,43)(27,28)(29,41)(34,44)(39,42)(45,48)(10,14)(15,16)(17,21,23,22)(18,27,26,28)(19,31,33,32)(20,36,38,37)(24,41,40,29)(25,44,43,34)(30,46,35,47)(39,48,42,45)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.